Attempting to mount Zip causes floppy access (2.2.16)

From: Nick Holloway (Nick.Holloway@alfie.demon.co.uk)
Date: Sat Sep 16 2000 - 06:35:24 EDT

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    I have a zip disk which I attempted to mount using the following fstab
    entry:

        /dev/sda4 /zip vfat noauto,nodev,nosuid,user

    This caused a spew of "bread failed" errors, and the mount process ended
    up blocked in "wait_on_buffer". I thought at first that Zip disk had
    gone to silicon heaven.

    After rebooting, I had a look at the kernel messages, and was _amazed_ to
    see the following:

        SCSI device sda: hdwr sector= 512 bytes.
        Sectors= 196608 [96 MB] [0.1 GB]
        sda: Write Protect is off
         sda: sda1 sda2 sda3 sda4
        floppy0: disk absent or changed during operation
        end_request: I/O error, dev 02:00 (floppy), sector 1
        bread in fat_access failed
        [...]

    There are two questions. Firstly, why did the mount process get stuck
    in the kernel, and secondly (and more importantly) what was it doing
    accessing "/dev/fd0"?

    The Zip is a bit suspect, as when I attempted to transfer stuff from
    a Windows machine, it reported the size as a few Mb, and had to be
    formatted. I don't know if the media is going bad, but I have just dd'd
    the contents off without problems.

    If I try and look at the partition table, "cfdisk" refuses, and "fdisk"
    complains bitterly. If I try and "dd if=/dev/sda4" then this just hangs,
    again in "wait_on_buffer".

    Regardless of bad media and corrupt partition tables, I don't see why
    the kernel is accessing a completely unrelated device.

    I'll leave the zip disk as it is, so if needed I can run any tests to
    try and isolate the problem.

    Details; Kernel 2.2.16; Debian 2.2; Zip+ 100 accessed through aha152x. 

    -- 
 `O O'  | Nick.Holloway@pyrites.org.uk
// ^ \\ | http://www.pyrites.org.uk/
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